diff --git a/crates/ctap2-proto/src/authenticator/client_pin/auth_protocol.rs b/crates/ctap2-proto/src/authenticator/client_pin/auth_protocol.rs
index 342ceef..1311b04 100644
--- a/crates/ctap2-proto/src/authenticator/client_pin/auth_protocol.rs
+++ b/crates/ctap2-proto/src/authenticator/client_pin/auth_protocol.rs
@@ -1,7 +1,9 @@
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+use std::marker::ConstParamTy;
+
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, ConstParamTy)]
 #[cfg_attr(
     feature = "serde",
     derive(Serialize, Deserialize),
diff --git a/crates/webauthn3-proto/src/client.rs b/crates/webauthn3-proto/src/client.rs
index d2a7ee4..739426c 100644
--- a/crates/webauthn3-proto/src/client.rs
+++ b/crates/webauthn3-proto/src/client.rs
@@ -1,10 +1,11 @@
 use crate::token;
+use std::marker::ConstParamTy;
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[derive(PartialEq, Eq, Clone, Copy)]
+#[derive(PartialEq, Eq, Clone, Copy, ConstParamTy)]
 pub enum DataType {
     #[cfg_attr(feature = "serde", serde(rename = "webauthn.create"))]
     Create,